Abstract-Thecomparison between the hybrid watermarking using genetic algorithm and the pure hybrid DCT-SVD (Discrete Cosine Transform-Singular Value Decomposition) is presented.The watermark scheme is based on DCT-SVD]; applying DCT to the host image, map the DCT coefficient in a zigzag order, then propose the SVD on the sub-block and the singular value in each sub block that will be modified to embed the watermark image. Afterward the image quality can be improved with the GA-based evolution. Experimental results are shown the best extracted watermark quality of hybrid DCT-SVD between the hybrid using genetic algorithm and pure hybrid DCT-SVD.
We observed night sky quality in several LAPAN stations (Agam, Bandung, Pontianak, Sumedang, Garut, Pasuruan, and Biak) which were conducted from April until July 2018 using Unihedron Sky Quality Meter LU-DL type. Observational data from all of the observational points were then sent regularly to a centralized database for further use. Although most of the measurements were done in overcast conditions, we were able to determine the representative clear sky brightness statistically. The results showed that the light pollution level of the most of the stations are moderate (the values at Biak, Agam, Sumedang, and Pontianak are 20.0, 19.5, 19.6, and 17.7 mpsas respectively) and the stations which are located near or in cities are high (Bandung and Pasuruan with 17.1 and 18.0 mpsas, respectively). In a particular station (Garut) the light pollution is low (20.6 mpsas), so it is good to make this spot to be a location of astrotourism.
The purpose of this study is to determine the effect of work discipline and organizational culture on Service Quality in learning and teaching process given by the civil servant teachers in order to improve student's achievement in Public Junior High School in Kuningan area. The research method used is explanatory research. This study was involving 118 civil servant teachers taken from 37 public junior high schools in Kuningan area. Based on the results of multiple regression analysis conducted, it shows that work discipline (X1) and organizational culture (X2) both have a significant and positive effect on Service Quality in the learning and teaching process (Y). The limitations found during the conducted study is work discipline and Organizational Culture become not only factors that influenced services quality, but also there are still many other variables that can affect the quality of service in the teaching and Learning Process.
In the learning process, teachers will face a variety of differences that children have, for example children who are slow to follow learning. A slow learner is not a stupid child. Children of slow learners are only delays in following the teaching and learning process compared to other children. This is caused by wrong perceptions of children, emotional disturbances, and errors in education.
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